Product Details

A standard pot magnet works for most applications, but when you need more holding force in a limited envelope or a specific mounting pattern, a customized cup magnet becomes the solution. The term "cup" often refers to a deeper drawn steel shell that allows a thicker magnet or additional flux rings. For example, we produced a customized cup magnet for an offshore wind turbine service platform: a 70mm diameter cup with 15mm depth (instead of standard 10mm) housing a N50 neodymium block, achieving 210 kg pull force – 35% higher than any standard catalog product. Beyond size, we modify cup wall thickness (1.5mm to 4mm), add side mounting brackets, or integrate a rubber skirt for non-slip contact. Every customized cup magnet goes through FEA magnetic simulation before tooling, ensuring you get the exact pull force without over‑engineering.

Customization Options – Cup Magnet Geometry

Custom Feature	Range / Options	Benefit
Cup Outer Diameter	15mm – 150mm (±0.05mm)	Fit existing bores or housings
Cup Depth (internal)	5mm – 30mm (deeper than standard pots)	Accommodates thicker magnets or dual‑stack magnets
Wall Thickness	1.0mm – 4.0mm (low carbon steel or stainless steel 430)	Increased durability or reduced weight
Magnet Material	Ferrite, NdFeB (N35–N52), SmCo (up to 300°C)	Match pull force and temperature requirement
Mounting Interface	Threaded stud (M3–M12), side lug, dovetail, or blind tapped hole	Direct bolt‑on without extra brackets
Surface Finish	Ni-Cu-Ni, Zn, Epoxy, PTFE, TPE overmold, or powder coating	Chemical resistance or non‑marring contact

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Why Engineer a Customized Cup Magnet?

Increase holding force by 20–50% through deeper cup and optimized flux ring

Reduce assembly steps – integrate mounting features directly into the cup

Solve spatial constraints: non‑standard diameters or ultra‑thin cups for tight gaps

Upgrade environmental resistance: choose stainless steel cup for saltwater or food contact

Real Custom Cup Magnet Projects

Project 1 – Robotic pick & place: Customized cup magnet with a side dovetail slot, allowing quick swapping on a gripper rail. 25mm diameter, 8mm height, holds 8 kg. Replaced vacuum cups that failed every 2 weeks.
Project 2 – Underwater inspection ROV: Stainless steel cup (304) with a neodymium magnet, fully laser‑welded seam. Withstands 50m depth, no corrosion after 6 months in saltwater.
Project 3 – Heavy machinery door latch: Customized cup magnet with a 120mm diameter and a rubber bumper ring. Pull force 280 kg. Works on uneven painted surfaces without scratching.

All these customized cup magnets were delivered with full 3D step files, pull force test videos, and a detailed magnetic simulation report.

Factory Capabilities – Full Customization Line

30 years in magnetic assemblies – we design cups, not just assemble
In-house deep‑drawing press (up to 200 ton) for cups up to 150mm diameter
Laser welding for stainless steel cups (hermetic sealing option)
CNC turning for threads and dovetails after cup forming
Prototype lead time: 10 days for cups without new stamping die (using CNC machining)
Mass production lead time: 20–30 days for 20,000 pcs

Packaging & Shipping

Each customized cup magnet is individually packed in foam-lined boxes to prevent magnetic attraction during transit. For stainless steel cups, we add a desiccant pack to avoid condensation. We ship via sea (FOB Ningbo), air (DDP to EU/US), or express for samples. All shipments include a certificate of conformity with measured pull force and a dimensional report.

After-Sales & Engineering Support

2-year warranty on magnetic performance. Free replacement if any dimension deviates from approved drawing. We also provide one free magnetic field mapping service for complex assemblies. Technical support available via WeChat, Skype, or email within 12 hours.

FAQ – Customized Cup Magnets

Q: What is the difference between a pot magnet and a cup magnet?

A: In industry, the terms are often interchangeable. But "cup" usually implies a deeper shell, sometimes with side walls extending beyond the magnet face to protect or guide. We treat "customized cup magnet" as any pot‑style magnet with modified depth, wall thickness, or mounting features beyond standard catalogs.

Q: Can you make a cup magnet with a non‑circular shape (e.g., rectangular cup)?

A> Yes – we produce rectangular cup magnets by stamping or CNC machining. Minimum order for rectangular cups: 1000 pieces. Tooling cost amortized over 5000 pieces.

Q: How do I provide my custom cup design?

A> We accept STEP, IGS, STL, or even a hand‑drawn sketch with critical dimensions. Our engineers will send a 2D drawing for approval before any tooling is cut.